Why did they die?

In Luke 13, the writer Luke tells the story of when some people asked Jesus what he thought about the murder of some worshipers in Galilee.  The question was not innocent, so Jesus' reply to them was to ask if they thought that the murdered victims were for some reason worse sinners than other Galileans.  This incident is set within a text where Jesus said it is best not to attempt to interpret the cause of random occasions of violence and suffering but rather to be at all times prepared for whatever may happen.  This sermon is about the importance of repentance.